Watch Queue Queue (c) Iron is more reactive than copper. Let us see how metals and non-metals behave with acids. Coal can be drawn into wires. Metal + Sodium hydroxide → Hydrogen. They are generally formed by non-metals. produce acids. You must have noticed that copper does not react with dilute hydrochloric acid even on heating but it reacts with sulphuric acid. C. Reactions with Acids . Non metals do not react with acid. Distinguish between metals and non-metals on the basis of these properties. (d) Coal can be drawn into wires. (c) Copper displaces zinc from zinc sulphate solution. F. Question 7. ( ) (d) Coal can be drawn into wires. Metals and Non-metals Class 10 MCQs Questions with Answers. Table 4.4 : Metals and Non-metals in Acids and Bases S.No. This is because when a substance reacts with acids, it provides electrons to the H+ ions produced by the acids. ( ) 3. Mark ‘T’ if the statement is true and ‘F’ if it is false. 2. 2] Metals are good conductors of heat but non-metals are poor conductors. Which of the following metals is in the liquid state at room temperature? Sodium is a very reactive metal. ( ) (b) Sodium is a very reactive metal. While magnesium, zinc, iron, tin and lead does not react vigorously with acids. Metals which fall below hydrogen in the reactivity series does not react with dilute acids. To prevent the contact of phosphorus with atmospheric oxygen, it is stored in water. Answer: (a) … Q.8. (d) Metals react with acids to produce __hydrogen__ gas. TABLE 4 3 Electrical Conductivity of Materials. Answer: a → F, b → T, c → F, d → F. Question 5: Some properties are listed in the following Table. 1] Metals are malleable and ductile.Non-metals do not have such properties. Reaction with W ater Let us see how metals and non-metals react with water . TABLE 4.2 Malleability of Materials. It catches fire if exposed to air. Non metals have low density. More reactive metals can displace less reactive metals from their salt solutions. Let us see how metals and non-metals behave with acids. Metal and non-metal both react with oxygen (air), water and acids. They act as acids when they dissolve in water, and this is why indicator paper must be moist in order to detect whether a non-metal oxide gas is acidic. Recall the name of some of the laboratory acids and bases you have read in Class VII. Identify the metal or non-metal present in them which forms oxides with oxygen. Generally, non-metals do not react with water though they may be very reactive in air. Generally metals react with acids to give salt and hydrogen gas. 8. Copper displaces zinc from zinc sulphate solution. Some properties are listed in the following Table. HNO 3 3 : 1 (c) Conc.HCl : Conc.HNO 3 3 : 1 (d) Dil.HCl : Dil.HNO 3 3 : 1 9. Question 5: Some properties are listed in the following table. A. H₂SO₄ B. HCl C. HNO₃ D. All the these . Which of the given acids does not give hydrogen gas on reacting with metals (except Mn and Mg)? Download free PDF of best NCERT Solutions , Class 8, Science, CBSE-Materials-metals and non-metals . Metals are good conductors of heat and electricity. Sol. Reactions with Bases . (a) Generally, non-metals react with acids. Match the substances given in Column A with their uses given in Column B. Reaction with bases : Most of the metals do not react with bases. A. Generally, non-metals react with acids. T. 3. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)? Non-metals do not react with acids except sulphur which react with hot, concentrated acid. In the following table some substances are given in column I. The acids react with aluminium to release hydrogen which would spoil the food and render it unfit for use. F. 4. Sodium is a very reactive metal. MP Board Class 8th Science Materials: Metals and Non-Metals NCERT Additional Important Questions. (a) Generally, non-metals react with acids. (d) Metals react with acids to produce hydrogen gas. ( ) 4. (F) (b) Sodium is a very reactive metal. Such non-metals are stored in water. Activity. 4. Mg + HCl → MgCl 2 + H 2 Fe + H 2 SO 4 → FeSO 4 + H 2. They cannot displace hydrogen to form a bond with a non-metal anion. Generally metals react with acids to give salt and hydrogen gas. 4) Mark ‘T’ if the statement is true and ‘F’ if it is false. (b) Sodium is a very reactive metal. Which of the following metals is an exception and can be cut with a knife? Non metals are poor conductors of heat and electricity. Non-metals are themselves acceptors of electrons so there is no way they can donate electrons to the hydrogen ion of the acid. All NCERT textbook questions have been solved by our expert teachers. MP Board Class 8th Science Materials: Metals and Non-Metals NCERT Intext and Projects Activities. Reaction of Metal With Other Metal Salts Non-metals: Generally, non-metals do not react with acids. 7. 5. Displacement reactions. You can refer to NCERT Solutions for Class 10 Science Chapter 3 Metals and Non-metals to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. ( ) (c) Copper displaces zinc from zinc sulphate solution. Such non-metals are stored in water. Generally, the non-metals do not react with acids. Mark ‘T’ if the statement is true and ‘F’ if it is false. ( ) 2. Generally, non-metals do not react with water though they may be very reactive in air. (a) Generally, non-metals react with acids (b) Sodium is a very reactive metal (c) Copper displaces zinc from zinc sulphate solution (d) Coal can be drawn into thin wires . Generally, oxides of non-metals are acidic in nature. … Soln: (a) Phosphorus is a very reactive non-metal. Non metals do not react with acids usually a metal reacts with acid to produce hydrogen gas while this is not observed with non metals, this is because metals are electro-positive . Watch Queue Queue. You must have found that non-metals generally do not react with acids but metals react with acids and produce hydrogen gas that burns with a ‘pop’ sound. Generally, non-metals do not react with bases. (d) Metals react with acids to produce __hydrogen__ gas. For example, phosphorus is a very reactive non-metal. (T) (c) Copper displaces zinc from zinc sulphate solution. 3] On burning, metals react with oxygen to produce metal oxides and hydrogen gas. Metals are generally hard. (F) (d) Coal can be drawn into wires. However, some metals like Al, Pb, Zn react with strong bases like NaOH to form complex salts and hydrogen gas. For example, phosphorus is a very reactive non-metal. Non-metals generally do not react with acids. (a) Generally, non-metals react with acids. ( ) (c) Copper displaces zinc from zinc sulphate solution. Distinguish between metals and non-metals on the basis of these properties. Acids and Bases React with Metals. Ans: (a) False (b) True (c) False (d) False . Acids react with most metals to form a salt and hydrogen gas. The acids react with metals to give hydrogen which would spoil the food and makes it unfit to use. Short Answer Type Questions. The composition of aqua-regia is A. Dil.HCl : Conc. Science Class 8 - Chapter 4 - Materials: Metals and Non -Metals - NCERT Exercise Solution ( Question-Answer) Provided here. Coal can be drawn into wires. Non – metals are electronegative and are unable to break the bond between H and O in water. 4. The first part of the chapter, Materials: Metals and Non -metals discusses the physical properties of metals and non-metals in a detailed manner. HNO₃ = 3 : … Metals have high density. Metals react with acids to produce metal salts and hydrogen gas, generally non- metals do not react with acids; Some of the metals react with bases to produce hydrogen gas. HNO 3 3 : 1 (b) Conc.HCl : Dil. It catches fire if exposed to air. They cannot displace less reactive metals from their salt solution. Metals react with sodium hydroxide to produce hydrogen gas. Activity 4.7 (To be demonstrated by the teacher. Non-metals’ reaction with sodium hydroxide is much complex. (d) Metals react with acids to produce _____ gas. Copper displaces zinc from zinc sulphate solution. (a) Generally, non-metals react with acids. Like Graphite. (b) Metals are good conductors of heat and electricity. (a) H 2 SO 4 (b) HCl (c) HNO 3 (d) All of these 8. To prevent the contact of phosphorus with atmospheric oxygen, it is stored in water. C. Reactions with Acids. This video is unavailable. As discussed previously, metals that are more active than acids can undergo a single displacement reaction.For example, zinc metal reacts with hydrochloric acid producing zinc chloride and hydrogen gas. The chapter starts with a discussion on appearances and hardness of different materials used commonly. Question 1. Aim: To show that hydrogen is produced when magnesium reacts with dilute sulphuric acid Materials needed: Magnesium ribbon, dilute sulphuric acid, test tube, dropper, and a matchstick Method: Take a piece of magnesium ribbon in the test tube. (F) (ii) Sodium is a very reactive metal. When a metal displaces another metal from a compound; this is called displacement reaction. F. 2. Reaction with Oxygen: Metals form oxides which are basic in nature. (F) Q.5 Some properties are listed in the following Table. Q 8. ( ) (b) Sodium is a very reactive metal. Note down their names in Table 4.4. The ability of metals to be drawn into thin wires is known as Distinguish between metals and non-metals … Examples- carbon dioxide, diphosphorus pentoxide and nitrogen dioxide. ( ) Answer: 1. Non-metals do not react with water (or steam) to evolve Hydrogen gas. (a) Generally, non-metals react with acids. Q4. The non – metals cannot reduce hydrogen by donating electrons. Oxides of aluminium (Al 2 O 3), zinc (ZnO), tin (SnO) and iron (Fe 2 O 3) are amphoteric. Generally, non-metals react with acids. (a) iron (b) sodium (c) gold (d) magnesium; Metals are generally solid. You can also get free sample papers, Notes, Important Questions. ( ) Answer: (i) Generally, non-metals react with acids. They react with acids as well as with bases. Question 1. ( ) (d) Coal can be drawn into wires. The composition of aqua-regia is (a) Dil.HCl : Conc. Science NCERT Grade 8, Chapter 4, Materials: Metals and Non-Metals lay emphasis on fundamentals of metals and non-metals. 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